Drier



(No Model.)

H. P. McD'ONALD.

DRIER. 7 No. 348,759. Patented Sept. 7, 1886.

WITNESSES a V I MENTOR @2065 MM 26 z BY 73m ATTORNEYS.

UNITED STATES PATENT OFFICE.

HARRY PEAKE MCDONALD, OF LOUISVILLE, KENTUCKY.

DRIER.

SPECIFICATION forming part of Letters Patent No. 348,759, dated September 7, 1886.

Application filed February 11, 1886. Serial No. 191,659.

To all whom it may concern:

Be it known that I, HARRY PEAKE MoDoN- ALD, of Louisville, in the county of Jelierson and State of Kentucky, have invented a new and useful Improvement in Drying Rooms or Buildings, 6220., of which the following is'a deseription.

My invention relates to improvements in buildings or rooms in which an abnormal atmosphere, whether dry or moist, hot or cold, is required to be maintained. Such rooms are used in manufactories for various purposes. For example, in atobaeco factory they are used for carrying out the process known as steaming and drying or sweating, in a laundry, to inclose a space in which the air must be kept very hot and at the same time rapidly renewed in order to dry clothes, and in a dry-kiln it would be applicable in the same way, for the same general purpose. Such rooms have generally been built of wood, on account of its ehcapness and the simplicity of construction it admits of. It is, however, a well-known fact that without great expense in preparation, 820., wood cannot be successfully used to form such inclosures unless both sides of the strips or boards are subjected alike to atmospheres having like degrees of heat and moisture, for if the air on one side is moist and on the other side dry the wood will immediately warp toward the dry side, also, if one side is cold and the other hot the wood will, in the same way, warp toward the dry or hot side. In addition to such warping. the wood will shrink or swell, as a whole, according as the air is dry or moist, either of which results makes it almost impossible to satisfactorily maintain an atmosphere differing greatly from normal in a wooden box or room, since the joints become loose, thus opening cracks and destroying the integrity of the structure, beside entailing constant care, expense, and anxiety. Vhilc sheet metal of any kind is not open to the specific objections above noted, it is objectionable on other grounds, and also expensive.

My invention obviates all these objections in that it enables me to provide a drying inclosure or room which is comparatively inexpensive in construction, and wherein a great degree of difference of temperature or moisture (No model.)

may be maintained without in any way affecting the integrity of the inclosing-surfaces.

In carrying out the invention I employ canvas, which is applied to a frame, as hereinafter described.

In the accompanying drawings, Figure 1 is a perspective View (a portion being broken away) of a drying-room constructed according to my plan. Fig. 2 is a horizontal section. Fig. 3 is a vertical cross-section. I apply canvas a a to both the inside and outside of wooden frames, which are arranged and connected to form a box or inclosure, as shown. The frame is composed of parallel horizontal bars or stringers c and the vertical posts a c.

For the sake of greater clearness of illustration, I will indicate how one of these rooms may be put up, without wishing to be understood that the manner shown is to be the way in which I would construct them in every case,

Let the posts 0 c c be set up at the corners and sides at suitable intervals and secured to sills and stringers 0 strongly, so that they may be covered with and duly support canvas or other textile fabric, having such thinness and elasticity as will secure the end in view. Let the covering a be stretched over the entire inside of the frame a c and secured to it by means of suitable fastenings. Now let the partitions Z), of cloth or canvas, be sewed to the outside of the inner covering, a, and secured at the ends to the posts 0 of the frame. To put the outer covering, a, on the sides, attach the cloth to the horizontal stringer c, (a portion of the frame which runs around the upper edge of the room,) and as it is gradually unrolled and comes down opposite the successive points, to which partitions b are attached, the latter are attached in the same vious that any other material than canvasfor example, even wood-could be used to form the divisions b, in which case the covers a a would simply be sewed, nailed, or otherwise secured to I).

By using a translucent material, such as 5 white canvas, the interior of this room would be abundantly lighted without the formation of any openings in the wall, which are both inconvenient and expensive.

In order to obviate any danger from fire, I KC paint the covers a a a a a a with silicate of soda or other fire-proof paint or solution.

Having thus described my invention, what I claim is-- 1. A drying room orstructurewhose walls 1 5 or inclosing sides and roof are composed of the HARRY PEAKE MCDONALD,

XVitnesses:

JoHN B. BASKIN, W ALBERT GRUTGHER 

